Where can I find free made animations?
I dunno if there's a lot of shared animations out there.  Maybe there are, haven't looked.  

You might find some on BlendSwap, or ask there if there's a certain one you had in mind.  

I know there's mo-cap data you can attach to skeletal deformations.   CMU Graphics Lab Motion Capture Database  Something like that might get you halfway to your goal.  

Couldn't say about non-organic objects.  Perhaps if other graphics programs offer them, they can be imported.  That's something you'd have to look up, 'cuz I've never expected someone else to do a scene for me; kinda defeats the purpose.